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Blue Box 6BR Lapua Brass

What neck wall thickness are you finding on this new Blue Box 6BR Lapua Brass? I have two boxes from the same lot, I am coming up with .012". Having a new reamer ground and would like to stay with the "no turn" neck, but the standard .272 is going to be a little large for this brass.

Thanks in advance for any help on this.
 
My .270" no turn neck chambering reamer is working fine with the new blue box Lapua at .012" to .0125" neck walls. If I want to use the older cardboard box, (at .013" to .0135"), I just give them a very light clean up cut, outside neck turning. My loaded rounds are measuring .2675" to .268" with the blue box, and that's the minimum clearence I'm comfortable with.
 
Here is the response from Kevin Thomas

From Kevin Thomas

Hi XXXX,

This sounds like some misreading, or a few pieces that were on the high end
of the spectrum, but no, the thinner brass is here to stay. To clarify that
a bit, there never was any change of specifications to the brass itself. As
with any manufacturing process, there are both minimum and maximum
dimensions for tolerances. The brass that some are now referring to as
"thick" necks were merely those that ran on the high end of the
specification. Inevitably, some ran a bit over, and caused problems with our
loaded ammunition not gaging properly in a the CIP neck gages. As a CIP
member, this is mandatory for us. As a result, we have had to run the brass
back to the middle of the tolerance range to ensure that they all pass the
CIP neck gage. This is the dimension you'll see in ALL future production.
Incidentally, while these changes took place more or less concurrently with
our switch to the new blue plastic boxes, there is no correlation between
the two, and the type of packaging does not guarantee which end of the
tolerance range the necks will fall into.

I hope this helps to clarify the situation, but if you have any other
questions or comments, please feel free to contact us again.

Sincerely,
Kevin Thomas
Sales & Marketing Manager, SCD CCF
Nammo Inc. - 123 Winchester Drive, Sedalia, MO 65301
Tel: 660-826-3232 - Cell: 660-596-2274 - Fax: 660-851-0800
ksthomas@lapua.us
 
jbarnwell said:
What neck wall thickness are you finding on this new Blue Box 6BR Lapua Brass? I have two boxes from the same lot, I am coming up with .012". Having a new reamer ground and would like to stay with the "no turn" neck, but the standard .272 is going to be a little large for this brass.

Dave Kiff at PTG has a reamer drawing for the blue box Lapua. See drawing below.
 

Attachments

Thanks gentleman, this is exactly the information I was looking for. Have already sent the dummies to Dave Kiff and requested a .270" neck.
 

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